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Anonymous
Anonymous asked in 科學其他:科學 · 1 decade ago

求救!一個物理問題~各位物理 英文達人

問題~能不能幫我翻譯成看的懂~白話一點的中文!

還有解釋一下題目!可以的話~解答也拜託了!

Update:

A startled armadillo leaps upward, rising 0.544m in the first 0.200s.(a)what is its initial speed as it leaves the ground?(b)what is its speed at the height of 0.544m? (c)How much higher does it go?

Update 2:

a)利用公式 H = V0 t - (1/2) g t2

=> 0.544 =V0 *2 - 0.5 * 9.8 * 22

=> V0 = 10.072 m/s

(b) V2 = V02 + 2aS

=> V2 = 10.0722 - 2 * 9.8 * 0.544 => V = 9.528 m/s

(c) V2 = V02 + 2aS

=> 0 = 10.0722 - 2 * 9.8 * S => S = 5.176 m

不好意思~能不能補充一下那些代號代表的意思!

可以的話解說一下為什麼這麼做?謝謝

Update 3:

尤其是2.3問題的a為什麼要帶9.8?

1 Answer

Rating
  • pphhxx
    Lv 5
    1 decade ago
    Favorite Answer

    一隻受驚嚇的犰狳往上跳,經過 2 s 時跳了 0.544m高,問

    (a)它的初速多少 (b)在高度0.544m時速度多少 (c)它可以跳多高

    (a)利用公式 H = V0 t - (1/2) g t2

    => 0.544 =V0 *2 - 0.5 * 9.8 * 22

    => V0 = 10.072 m/s

    (b) V2 = V02 + 2aS

    => V2 = 10.0722 - 2 * 9.8 * 0.544 => V = 9.528 m/s

    (c) V2 = V02 + 2aS

    => 0 = 10.0722 - 2 * 9.8 * S => S = 5.176 m

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